A single-sided formwork structure for a parapet

Abstract

This utility model relates to a single-sided formwork structure for a parapet wall, comprising a floor deck, a bottom edge sealing plate connected between the floor deck and the frame steel beam, a top edge sealing plate connected to the top of the floor deck, steel stiffening ribs for longitudinal reinforcement inside the floor deck, and an internal formwork system. The internal formwork system includes a template, back ribs and uprights connecting the outside of the template, tie rods, and outriggers. The bottom edge sealing plate is vertically connected to the floor slab, and the floor deck is fixedly connected to the bottom and top edge sealing plates, with the bottom of the floor deck anchored within the parapet wall's upturned structure. Several steel stiffening ribs are longitudinally arranged inside the parapet wall, and these ribs are fixedly connected to the bottom chord reinforcement of the floor deck. This parapet wall uses prefabricated floor deck as the horizontal force bearing and outer formwork during construction, allowing for rapid on-site installation. Furthermore, it eliminates the need for external scaffolding during parapet wall construction, saving costs and simplifying the construction process. Workers do not need to operate from the outside of the building, ensuring construction safety.

Description

Technical Field

[0001] This utility model belongs to the field of building construction, specifically relating to a single-sided formwork structure for parapet walls, which is applicable to various types of cast-in-place concrete structure projects. Background Technology

[0002] In modern construction projects, parapet walls are mostly constructed using cast-in-place concrete. The conventional construction steps are: first, reinforcement bars are laid at the location where the parapet wall will be poured, and protective pads are installed; then, formwork is erected on both sides of the reinforcement bars. However, before the formwork is installed, scaffolding needs to be erected on the outside of the parapet wall as a construction platform and safety protection facility. This process consumes a large amount of reusable materials and labor, which not only increases construction costs but also extends the construction period.

[0003] Currently, steel structure floor slabs (such as profiled steel sheet composite floor slabs and steel truss floor slabs) are widely used in various steel structure floor and roof projects because they can be poured with concrete without formwork, making construction convenient and efficient. However, the parapet walls of steel structure buildings extending onto the roof still use reinforced concrete formwork and cast-in-place construction. Especially for high-rise or super high-rise steel structure projects, external scaffolding is usually not set up except for the core tube. If external scaffolding is erected as a construction platform for the reinforced concrete parapet wall, it will not only have a long erection period and low construction efficiency, but also be costly and pose significant safety hazards. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing construction technologies by designing a single-sided formwork structure for parapet walls. It aims to solve the construction problems caused by traditional scaffolding erection, help improve the safety and efficiency of parapet wall construction, optimize the construction process, and reduce costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a single-sided formwork structure for a parapet wall, comprising a floor deck, a bottom edge sealing plate, a top edge sealing plate, steel stiffening ribs, and an inner formwork system; the bottom edge sealing plate is connected between the floor deck and the frame steel beam, the top edge sealing plate is connected to the top of the floor deck, and the steel stiffening ribs are disposed inside the floor deck for longitudinal reinforcement.

[0006] The internal formwork system includes a template set inside the parapet wall to be poured, a back brace and a vertical pole connected to the outside of the template, a tie rod embedded in the parapet wall's upturn structure, and a brace supported on the vertical pole, with one end of the brace supported on a short steel bar embedded in the floor slab.

[0007] The floor slab and the parapet wall upturn structure are cast and formed simultaneously to form an integral structure; the bottom edge sealing plate is vertically connected to the floor slab; the floor decking is welded and fixed to the bottom edge sealing plate and the top edge sealing plate, and the bottom of the floor decking is anchored in the parapet wall upturn structure; the steel stiffening ribs are arranged along the entire length and welded and fixed to the lower chord steel bars of the floor decking.

[0008] The floor decking includes a profiled steel sheet, upper and lower chord reinforcing bars arranged parallel to the profiled steel sheet, and web reinforcing bars arranged in a wavy pattern between the upper and lower chord reinforcing bars; the bottom of the profiled steel sheet overlaps with the vertical plates of the top and bottom edge sealing plates.

[0009] The bottom ends of the upper and lower chord reinforcing bars are anchored into the floor slab by additional L-shaped reinforcing bars, and the top ends of the upper and lower chord reinforcing bars are closed by additional U-shaped reinforcing bars.

[0010] The floor deck is a precast component used to bear the horizontal load of the parapet wall during construction and to serve as the outer formwork, eliminating the need for external scaffolding during construction.

[0011] Compared with the prior art, the present invention has the following advantages: This utility model of a single-sided parapet wall support system is reasonably and effectively designed. The parapet wall uses prefabricated floor decking as the outer formwork for the parapet wall during construction. On-site installation is fast, and no external scaffolding needs to be erected during the construction of the parapet wall, saving costs. The construction process is simple, and workers do not need to operate from the outside of the building, ensuring construction safety. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art or ordinary skills, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the single-sided formwork support system for the parapet wall of this utility model.

[0014] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0015] Figure 3 A schematic diagram of the reinforcement anchorage of the floor deck truss for the parapet wall.

[0016] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0017] Figure 5 This is a schematic diagram of a floor decking.

[0018] Explanation of reference numerals in the attached drawings: 1. Floor decking; 2. Frame steel beam; 3. Bottom edge sealing plate; 4. Top edge sealing plate; 5. Steel stiffening rib; 6. Formwork; 7. Back rib; 8. Upright pole; 9. Parapet wall flip-up structure; 10. Tie member; 11. Outrigger; 12. Floor slab; 13. Bottom chord reinforcement; 14. Profiled steel sheet; 15. Top chord reinforcement; 16. Web reinforcement; 17. L-shaped reinforcement; 18. U-shaped reinforcement; 19. Short reinforcement. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-2 As shown, a single-sided formwork structure for a parapet wall includes a floor deck 1, a bottom edge sealing plate 3, a top edge sealing plate 4, steel stiffening ribs 5, and an inner formwork system; the bottom edge sealing plate 3 is connected between the floor deck 1 and the frame steel beam 2, the top edge sealing plate 4 is connected to the top of the floor deck 1, and the steel stiffening ribs 5 are set inside the floor deck 1 for longitudinal reinforcement.

[0021] like Figure 1-2 As shown, the inner formwork system includes a formwork 6 set inside the parapet wall to be poured, a back rib 7 and a vertical pole 8 connected to the outside of the formwork 6, a tie member 10 embedded in the parapet wall upturn structure 9, and a bracing 11 supported on the vertical pole 8. One end of the bracing 11 is supported on a short steel bar 19 embedded in the floor slab 12.

[0022] like Figure 3-4 As shown, during the pouring of the floor slab 12, the bottom upturned structure 9 of the parapet wall is simultaneously poured, ensuring that the parapet wall upturned structure 9 and the floor slab 12 form an integral whole. The bottom sealing plate 3 is vertically connected to the floor slab 12, and the floor deck 1 is welded and fixedly connected to the bottom sealing plate 3 and the top sealing plate 4. The bottom of the floor deck 1 is anchored within the parapet wall upturned structure 9, and the longitudinal steel stiffening ribs 5 are arranged along the entire length and welded and fixedly connected to the lower chord steel bars 13 of the floor deck 1.

[0023] like Figure 3-4 As shown in Figure 5, the floor deck 1 includes a profiled steel sheet 14, an upper chord steel bar 15 and a lower chord steel bar 13 arranged parallel to the profiled steel sheet 14, and a web steel bar 16 arranged in a wavy shape between the upper chord steel bar 15 and the lower chord steel bar 13; the bottom of the profiled steel sheet 14 overlaps with the vertical plates of the top edge sealing plate 4 and the bottom edge sealing plate 3.

[0024] like Figure 3-4As shown, the bottom ends of the upper chord steel bar 15 and the lower chord steel bar 13 are anchored into the floor slab 12 by additional L-shaped steel bars 17, and the top ends of the upper chord steel bar 15 and the lower chord steel bar 13 are closed by additional U-shaped steel bars 18.

[0025] The floor deck 1 is a precast component. The parapet wall uses the precast floor deck 1 as the load-bearing material for the horizontal forces and the outer formwork during construction. On-site installation is fast, and no external scaffolding is required during parapet wall construction, saving costs. The construction process is simple, and workers do not need to operate from the outside of the building, ensuring construction safety. The floor deck 1 adopts a modular design and standardized factory production, reducing on-site processing time and thus shortening the construction cycle.

[0026] Detailed installation process of single-sided formwork structure for parapet wall: The installation of the single-sided formwork structure for the parapet wall described in this utility model mainly includes key steps such as prefabrication preparation, base construction, floor slab installation, internal formwork system erection, and concrete pouring. The specific process is as follows: Step 1: Preparation of precast components and treatment of the base layer 1. The floor deck 1 is prefabricated in the factory, and its structure includes profiled steel sheet 14 and upper chord steel bars 15, lower chord steel bars 13 and corrugated web steel bars 16 arranged in parallel and welded to it.

[0027] 2. At the construction site, after the floor slab reinforcement 12 is tied, additional L-shaped reinforcement 17 for anchoring the floor slab and short reinforcement 19 for supporting the outrigger 11 are pre-embedded at the predetermined positions.

[0028] Step 2: Simultaneously pour the floor slab and the upward-turning structure. 1. Erect the formwork for floor slab 12, and simultaneously erect the formwork for the parapet wall bottom upturned structure 9, ensuring that the two formwork systems are connected.

[0029] 2. Pour concrete to form the floor slab 12 and the parapet wall upturn structure 9 into a single integral casting. During the pouring process, pre-embed tie members 10 within the upturn structure.

[0030] Step 3: Install the bottom and top edge banding panels 1. After the concrete of the floor slab reaches a certain strength, level the base layer.

[0031] 2. Place the bottom edge sealing plate 3 vertically on the floor slab 12 and connect and fix one side of it to the frame steel beam 2.

[0032] 3. Install the top edge sealing plate 4 according to the design height.

[0033] Step 4: Install and fix the floor decking 1. Hoist the prefabricated floor deck 1 to the predetermined position so that its bottom rests on the formed upturned structure.

[0034] 2. Adjust the position of the floor deck 1 so that its bottom is in close contact with the bottom edge banding 3 and its top is aligned with the top edge banding 4.

[0035] 3. Weld and fix the bottom of the floor deck 1 to the bottom edge sealing plate 3 and the top to the top edge sealing plate 4.

[0036] 4. Tie or weld the bottom end of the bottom chord steel bar 13 of the floor deck 1 to the pre-embedded L-shaped steel bar 17 to achieve anchorage; use U-shaped steel bar 18 to close the top of the upper and lower chord steel bars.

[0037] 5. The steel stiffening ribs 5 arranged along the entire length are welded and fixed to the lower chord steel bars 13 of the floor deck 1 to enhance its overall rigidity and resistance to lateral displacement.

[0038] Step 5: Install the internal mold system 1. Install template 6 on the inside of the parapet wall.

[0039] 2. Install vertical back bracing 7 and uprights 8 on the outside of template 6.

[0040] 3. Use the tie rods 10 embedded in the upturned structure 9 to tie and fix the back ribs 7 or the uprights 8 to prevent the template from shifting inward.

[0041] 4. One end of the outrigger 11 is supported on the upright 8, and the other end is supported on the short steel bar 19 embedded in the floor slab 12 to form a stable triangular support to resist the lateral pressure during concrete pouring and prevent the formwork system from overturning.

[0042] Step 6: Pouring and curing the parapet wall concrete 1. Check the firmness of all connection points, weld points, and support points.

[0043] 2. Pour concrete into the parapet wall formwork 6 from the inside of the building.

[0044] 3. After the concrete strength reaches the specification requirements, remove the inner formwork system (formwork 6, back rib 7, upright 8, outrigger 11).

[0045] 4. Carry out subsequent maintenance and finishing work.

[0046] Key advantages of the installation process: This installation process fully utilizes the characteristics of precast floor decks as both permanent external formwork and load-bearing components. All major procedures (such as rebar tying, formwork erection, and concrete pouring) are completed inside the building, completely avoiding the need to erect scaffolding or operating platforms on the outside of the building. This greatly improves construction safety, simplifies the process, shortens the construction period, and reduces costs.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A parapet single-sided formwork structure, characterized by: It includes a floor deck (1), a bottom edge sealing plate (3), a top edge sealing plate (4), steel stiffening ribs (5), and an inner mold system; the bottom edge sealing plate (3) is connected between the floor deck (1) and the frame steel beam (2), the top edge sealing plate (4) is connected to the top of the floor deck (1), and the steel stiffening ribs (5) are set inside the floor deck (1) for longitudinal reinforcement.

2. The parapet single-sided formwork structure according to claim 1, wherein: The internal formwork system includes a template (6) set inside the parapet wall to be poured, a back rib (7) and a vertical pole (8) connected to the outside of the template (6), a tie rod (10) embedded in the parapet wall upturn structure (9), and a brace (11) supported on the vertical pole (8). One end of the brace (11) is supported on a short steel bar (19) embedded in the floor slab (12).

3. The parapet single-sided formwork structure according to claim 2, wherein: The floor slab (12) and the parapet wall upturn structure (9) are cast and formed simultaneously to form an integral structure; the bottom sealing plate (3) is vertically connected to the floor slab (12); the floor deck (1) is welded and fixed to the bottom sealing plate (3) and the top sealing plate (4), and the bottom of the floor deck (1) is anchored in the parapet wall upturn structure (9); the steel stiffening rib (5) is arranged along the entire length and welded and fixed to the bottom chord steel bar (13) of the floor deck (1).

4. The parapet single-sided formwork structure according to claim 3, wherein The floor deck (1) includes a profiled steel sheet (14), an upper chord steel bar (15) and a lower chord steel bar (13) arranged parallel to the profiled steel sheet (14), and a web steel bar (16) arranged in a wavy pattern between the upper chord steel bar (15) and the lower chord steel bar (13); the bottom of the profiled steel sheet (14) overlaps with the vertical plates of the top edge plate (4) and the bottom edge plate (3).

5. The parapet single-sided formwork structure according to claim 4, wherein The bottom ends of the upper chord steel bar (15) and the lower chord steel bar (13) are anchored into the floor slab (12) by additional L-shaped steel bars (17), and the top ends of the upper chord steel bar (15) and the lower chord steel bar (13) are closed by additional U-shaped steel bars (18).

6. The parapet single-sided formwork structure according to claim 5, wherein The floor deck (1) is a prefabricated component used to bear the horizontal load of the parapet wall during construction and to serve as the outer formwork. No external scaffolding needs to be erected during construction.

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